Sulfur poisoning of Pt/Al2O3 catalysts, II. Influence of sulfate impurities on carbon monoxide chemisorption and butane hydrogenolysis

Autor:	Edouard Garbowski, A. Melchor, Michel Primet, M. V. Mathieu
Rok vydání:	1985
Předmět:	chemistry.chemical_classification Sulfide Chemistry Hydrogen sulfide Inorganic chemistry chemistry.chemical_element Butane Sulfur Catalysis chemistry.chemical_compound Hydrogenolysis Physical and Theoretical Chemistry Sulfate Platinum
Zdroj:	Reaction Kinetics and Catalysis Letters. 29:379-386
ISSN:	1588-2837 0133-1736
DOI:	10.1007/bf02068530
Popis:	Sulfate contamination of Pt/Al2O3 catalysts does not affect the metal properties for temperatures of reduction lower than 300°C. After hydrogen treatment at 500°C, the sulfate groups were reduced into hydrogen sulfide which poisons platinum. Poisoning by sulfate impurities is especially drastic for low metal loadings. The adsorption of CO in the bridged form is no longer observed for platinum sulfur coverages higher than 0.28 S/Pts. The rate of butane hydrogenolysis strongly decreases with the sulfur coverage. Hydrogenolysis at the end of the chain is less affected than hydrogenolysis in the middle of the molecule.
Databáze:	OpenAIRE
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